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    <title>Document</title>
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    <script>
        console.log(3 >= 5);
        console.log(3 <= 5);
        console.log(3 == 5);
        console.log('pink' == '刘德华');
        console.log(18 == 18); //true
        console.log('18' == 18); // true
        console.log('18' != 18); // true
        console.log('18' === 18); // 全等（数据类型也要等）false
    </script>
</body>

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